Question
Intermolecular forces between $$n$$ - hexane and $$n$$ - heptane are nearly same as between hexane and heptane individually. When these two are mixed, which of the following is not true about the solution formed ?
A.
It obeys Raoult's law, i.e. $${p_A} = {x_A}p_{\text{A}}^{\text{o}}$$ and $${p_B} = {x_B}p_B^{\text{o}}$$
B.
$$\Delta {H_{{\text{mixing}}}}$$ is zero
C.
$$\Delta {V_{{\text{mixing}}}}$$ is zero
D.
It forms minimum boiling azeotrope.
Answer :
It forms minimum boiling azeotrope.
Solution :
Azeotropes are formed by the solutions which show deviations from ideal behaviour.